Low sperm viability

Introduction Low sperm survival rate refers to sperm survival rate (more than 50% of dead sperm), sperm morphology (less than 70% of normal morphology sperm), semen acid phosphatase (less than 2.5 to 60,000 units / ml), semen fructose (less than 150) ~800 mg / 100 ml).

Cause

1. If a man has a habit of taking a hot bath, it will reduce sperm production.

2. Frequent sexual intercourse will reduce the amount of sperm in each ejaculation semen, resulting in low sperm survival rate.

3. Receiving large doses of radiation can cause sperm chromosomal aberrations.

4. Nicotine in cigarettes not only reduces the secretion of sex hormones in males, but also has direct killing ability to sperm, resulting in low sperm survival rate.

5. Long-term heavy drinking, alcohol will make 70% of sperm dysplasia or loss of vitality.

6. Men's zinc deficiency will reduce sexual desire and sexual function, and the decrease in sperm count leads to low sperm survival rate.

an examination

Related inspection

Semen volume sperm climbing test semen check sperm fertilization ability determination semen bacteria

Diagnosis is based on routine analysis of semen and medical history. After 3 to 7 days of abstinence, masturbation is performed. After 3 consecutive episodes of semen routine analysis, the sperm forward movement (a+b grade) is less than 50% or the fast linear forward movement is less than 25%, and the sperm density is greater than 20 ~106/mL, other parameters are normal or basically normal can be diagnosed as weak sperm disease. 1 h after ejaculation, the sperm motility rate is less than 50%, laboratory or other auxiliary examination can find genital tract infections, or other diseases that affect sperm motility, can be diagnosed.

Differential diagnosis

Too many dead sperm: Death syndrome refers to multiple semen examinations, and sperm are dead. Under normal circumstances, semen excreted within 1 hour of the body, the normal survival of sperm should be more than 70%, such as dead sperm more than 40% will affect pregnancy. Sperm survival time should maintain a 6-hour survival rate of more than 20%, such as no survival of sperm within 6 hours, can cause infertility.

Sperm abnormality: sperm abnormality refers to the amount of sperm, qualitative abnormalities, deformities, etc., is a kind of sperm motility with low sperm motility: sperm motility is an indicator for comprehensive evaluation of sperm quantity and quality, including normal activities in semen The number of sperm, ie sperm motility, and the quality of normal active sperm, ie sperm motility. The method of diagnosis of sperm motility is not yet unified, but it tends to a five-level classification. The content is: level 0 is no vitality. Level 1 is poorly vibrating, indicating that the sperm moves or moves in place only. Level 2 is medium in vitality, indicating that the sperm swims straight ahead but is not active. Level 3 is good for vitality, indicating good sperm motility, and level 4 is very active, indicating that the sperm is actively moving forward in a straight line. Sperm hypoactivity refers to sperm motility below level 2, and the number of active spermatozoa is less than 50%.

Sperm is rare: oligozoospermia is a man whose sperm count is lower than normal healthy fertility. It is now considered that the number of sperm is less than 20 million per ml for oligozoospermia. However, clinically, there are often changes in sperm motility, poor forward motility, and high sperm deformity. This is called weak azoospermia, which is a more common condition of male infertility.

Sperm quality decline: sperm quality decline means that the number of sperm, survival rate and activity capacity, density, etc. are reduced at the same volume level.

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